JP2019157499A - Pile driver - Google Patents

Abstract

To provide a pile driver including a swing suppressing member capable of effectively suppressing the vibration of a steel pipe pile and improving the verticality while having a simple structure.SOLUTION: In a swing suppressing member 26, a first connecting portion 43d and a second connecting portion 44d for connecting rotating ends of a first rotating arm and a second rotating arm to the rotating ends of the first rotating arm 43 and the second rotating arm 44 are provided. The first rotating arm and the second rotating arm are configured to be openable and closable between a closed state in which the first connecting portion and the second connecting portion are connected by a connecting pin 45 to hold a steel pipe pile 38, and an open state in which the connecting pin is removed and the first rotating arm and the second rotating arm are opened. In the closed state, a spacer member 47 that closes an opening 46 formed between a first inner arcuate recess 43b and a second inner arcuate recess 44b on a base side of the first rotating arm and the second rotating arm is detachably provided between the first rotating arm and the second rotating arm.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a pile driving machine, and more particularly, to a pile driving machine including a bracing member that supports a steel pipe pile mounted on a work device so as to be rotatable and movable in an axial direction in front of a lower portion of a leader.

  In a pile driving machine for embedding a steel pipe pile, a bracing member is provided at the lower part of the leader to prevent the steel pipe pile from being tilted so that the steel pipe pile under construction is not inclined or misaligned. This anti-vibration member is generally formed of a pair of left and right rotating arms attached to a bracket fixed to the lower part of the reader so as to be openable and closable. Are connected to each other by rotating the arm, and the steel pipe pile can be rotated by holding the steel pipe pile in an arcuate recess provided in the arm. It will be in the state supported so that the movement to an axial direction was possible (for example, refer patent document 1).

Japanese Patent Laying-Open No. 2015-218538

  On the other hand, in order to add a steel pipe pile, an operation of opening the bracing member and turning the upper turning body in its place is performed, and the shape of the rotating arm is from the position where the steel pipe pile is held. Even if the rotating arm is rotated outward, it is considered not to interfere with the pile head of the buried steel pipe pile. Therefore, the bracing member holds the steel pipe pile in a substantially C shape in a plan view by the arc-shaped concave portion with the rotating arm closed, that is, in a state where a part of the opening / closing fulcrum side is opened, During construction, there was a problem that the steel pipe pile to be embedded was swung in a direction without an arcuate recess and the verticality was lowered.

  Therefore, an object of the present invention is to provide a pile driving machine including a bracing member that can effectively suppress the swing of a steel pipe pile and improve the verticality while having a simple structure.

  In order to achieve the above object, the pile driving machine of the present invention is erected at the front part of a base machine comprising a lower traveling body provided with a crawler and an upper revolving body provided on the upper portion of the lower traveling body so as to be able to swivel. In the pile driving machine, the working device is arranged along the leader so as to be movable up and down, and a bracing member that holds an outer peripheral surface of a steel pipe pile rotated by the working device is arranged below the leader. The stop member has a pair of arcuate recesses that can come into contact with the outer peripheral surface of the steel pipe pile, and is attached to be pivotable in a horizontal direction around a pair of pivot shafts provided at a lower portion of the leader. The pair of rotation arms includes a first connection portion and a second connection portion that connect the rotation ends of the pair of rotation arms to the rotation end portions of the pair of rotation arms. The arm includes the first connecting portion and the second connecting portion. It is configured to be openable and closable between a closed state in which the steel pipe pile is held by connecting with a tie pin, and an open state in which the pair of rotating arms are opened by removing the connection pin, and in the closed state, A spacer member that closes an opening formed between the arcuate recesses on the base side of the pair of rotating arms is detachably provided between the pair of rotating arms.

  Further, the pair of rotating arms are provided with engaging concave portions or engaging convex portions that are engageable in the horizontal direction by inserting both ends of the spacer member in the axial direction of the steel pipe pile. The spacer member includes an arcuate recess that can contact the outer peripheral surface of the steel pipe pile.

  According to the present invention, since the opening is closed by the detachable spacer member disposed between the two rotating arms in a state in which the bracing member is closed, the steel pipe pile can be constructed with a simple structure. The verticality can be improved by effectively suppressing the shake. Moreover, in the state where the bracing member is opened, both the rotating arms can be sufficiently separated from the buried steel pipe pile, and even if the upper rotating body is rotated in its place, both rotating The arm does not contact the steel pipe pile, and the steel pipe pile can be added efficiently.

  Furthermore, since both the end portions of the spacer member are inserted in the axial direction of the steel pipe piles in both pivot arms, and the engagement recesses or engagement projections that can be engaged in the horizontal direction are provided, the spacer member can be attached and detached. In addition to being able to be performed easily and quickly, the engagement portion is not released by vibration caused by the rotation of the steel pipe pile, and the steel pipe pile can be stably buried.

It is a side view of a pile driver which shows one example of the present invention. Similarly, it is a principal part top view which shows the state which closed the bracing member and mounted | worn the spacer member. Similarly, it is a principal part enlarged plan view. It is IV-IV sectional drawing of FIG. Similarly, it is a perspective view of a spacer member.

  1 to 5 are diagrams showing an example of a pile driving machine according to the present invention. As shown in FIG. 1, the pile driving machine 11 includes a lower traveling body 12 having a crawler 12 a and an upper revolving body 13 that is turnably provided on the lower traveling body 12. And a leader 15 provided at the front of the upper swing body 13 so as to be raised and lowered, and a raising and lowering cylinder 16 for the leader that supports the leader 15 from the rear. Further, a front bracket 17 that supports the leader 15 so as to be raised and lowered is provided at the front portion of the upper swing body 13, and a pipe support member 18 that supports hydraulic piping is provided above the front portion of the upper swing body 13. ing. Furthermore, a driver's cab 19 is provided on the right side of the upper swing body 13, and an equipment room 20 containing an engine and a hydraulic unit is provided on the left side.

  The reader 15 includes a lower reader 22 rotatably attached to a support shaft 21 provided in the front bracket 17 in the width direction of the base machine, an intermediate reader 23 connected to the upper portion of the lower reader 22, and the intermediate The upper reader 24 connected to the upper portion of the reader 23 is divided, and the intermediate reader 23 is divided into an intermediate first member 23a and an intermediate second member 23b. The upper reader 24 is divided into an upper first member. 24a, the upper second member 24b, and the upper third member 24c are divided and formed. Each of these leader members is detachably connected by a flange member using bolts and nuts.

  The tip of the cylinder rod 16a of the hoisting cylinder 16 and the intermediate leader 23 are rotatably connected to a cylinder bracket 23c provided on the rear surface of the intermediate second member 23b via a connection pin. Further, a top sheave block 25 is disposed at the upper end of the upper reader 24, and a rocking member 26 is disposed in front of the lower portion of the lower reader 22. An auger 27, which is a working device, can be moved up and down on the front surface of the reader 15. And a chain type lifting device 28 for raising and lowering the auger 27 is provided.

  The auger 27 moves up and down along the leader 15 in a state where a pair of guide pipes 29 provided on both sides of the leader 15 are gripped by a pair of left and right upper guide gibbs 30 and lower guide gibs 31 provided on the rear side of the auger 27. At the top and bottom of the auger 27, both ends of a lifting chain 34 spanned between a drive sprocket 32 provided at the lower end portion of the lower leader 22 and a driven sprocket 33 provided at the upper end portion of the upper leader 24. Are attached to each. The chain-type lifting device 28 drives the drive sprocket 32 by an auger lifting / lowering hydraulic motor, and moves the lifting chain 34 wound around the driving sprocket 32 and the driven sprocket 33 in the vertical direction, thereby causing the reader 15 to move. The auger 27 is moved up and down along.

  Further, the auger 27 is inserted through the drive rod 35 so as to be rotatable and movable in the axial direction, and the groove portion of the drive rod 35 is engaged with a chuck device 36 provided on the lower side of the auger 27 so that the drive rod 35 While restricting the movement in the axial direction, the drive rod 35 is rotated by driving the output mechanism 37 with an auger drive hydraulic motor while the angular shaft portion is engaged with the output mechanism 37. When this pile driving machine 11 is used for the purpose of burying a steel pipe pile, a steel pipe pile 38 is used as a construction member, and the upper end of the steel pipe pile 38 is provided via a cap rod 39 provided at the lower end of the drive rod 35. Connected.

  As shown in FIGS. 2 to 4, the bracing member 26 is attached via a bracket 40 provided at the lower end portion of the reader 15, and a vertical first rotation shaft 41 is provided on both sides of the bracket 40. And a second rotation shaft 42, a first rotation arm 43 is rotatably attached to the first rotation shaft 41, and a second rotation arm 44 is attached to the second rotation shaft 42. It is pivotally attached. The first rotation shaft 41 and the second rotation shaft 42 are disposed in front of both side edges of the reader 15 in the width direction, and the interval between the rotation shafts 41 and 42 is larger than the outer diameter of the steel pipe pile 38. It has become.

  Each of the rotating arms 43 and 44 includes a first rotating base 43a and a second rotating base 44a that are rotatably connected to the first rotating shaft 41 and the second rotating shaft 42, respectively, and the rotating base. The first pile holding portion 43c and the first pile holding portion 43c, which are formed on the front end side of 43a, 44a and respectively include a first inner arcuate recess 43b and a second inner arcuate recess 44b that enclose the outer peripheral surface of the steel pipe pile 38, respectively. 2 pile holding portions 44c and the tip ends of the pile holding portions 43c and 44c, that is, the rotating end portions of the rotating arms 43 and 44, and the rotating ends of both pile holding portions 43c and 44c are connected to each other. The first connecting portion 43d and the second connecting portion 44d are connected to each other by the connecting pin 45 and are in a closed state in which the steel pipe pile 38 is held by the first inner arcuate recess 43b and the second inner arcuate recess 44b.

  The arc opening angles of the first inner arcuate recess 43b in the first rotating arm 43 and the second inner arcuate recess 44b in the second rotating arm 44 are the first inner arcuate recess 43b and the second inner arcuate recess 44b. Are set at angles respectively positioned outside the first rotation shaft 41 and the second rotation shaft 42 in the reader width direction, and the shapes of the first rotation arm 43 and the second rotation arm 44 are substantially the same. The first rotating arm 43 and the second rotating arm 44 are rotated about the first rotating shaft 41 and the second rotating shaft 42, respectively. A narrow plan view arc that does not come into contact with the outer peripheral surface of the buried steel pipe pile 38 even when an operation of turning the upper turning body 13 in its place is performed in the open state indicated by an imaginary line in FIG. It is formed in a plate shape.

  Further, the positions of both the connecting portions 43d and 44d when the first connecting portion 43d and the second connecting portion 44d are connected and the respective rotating arms 43 and 44 are closed sandwich the center C1 of the steel pipe pile 38. It is arranged at a position facing the bracket 40. Further, in a state where the rotating arms 43 and 44 are closed, the ends 43e and 44e of the first inner arcuate recess 43b and the second inner arcuate recess 44b are close to each other, but the first inner arcuate recess 43b. The other end 43f, 44f of the second inner arcuate recess 44b is in a state where an opening 46 is formed apart from each other so as not to interfere with the steel pipe pile 38 when the rotary arms 43, 44 are opened and closed. The opening 46 is closed by a detachable spacer member 47 disposed between the first rotation base 43a and the second rotation base 44a of both the rotation arms 43, 44.

  As shown in FIGS. 3 and 4, the first pile holding portion 43 c is disposed on the outer side of the first inner arcuate recess 43 b with a certain interval and is provided on the first rotation base 43 a. A first outer arcuate recess 43h having a curved surface corresponding to the first wall 43g is provided, and the first rotation base is in a state where the first outer arcuate recess 43h and the first wall 43g are close to each other. A plurality of bolts 48 are screwed to 43a. The second pile holding portion 44c corresponds to the second wall portion 44g provided on the second rotation base portion 44a and disposed at a constant interval outside the second inner arcuate recess portion 44b. A second outer arcuate recess 44h having a curved surface is provided, and the second outer arcuate recess 44h and the second wall 44g are close to each other with a plurality of bolts 48 screwed to the second rotation base 44a. It is worn. Furthermore, the both ends of the spacer member 47 are the 1st engaging recessed parts which are each inserted in the axial direction of the steel pipe pile 38 at the base end side upper surface of the 1st pile holding part 43c and the 2nd pile holding part 44c. A first notch 43i and a second notch 44i that is a second engaging recess are provided.

  As shown in FIG. 5, the spacer member 47 includes an inner closing plate 47a that is an arc-shaped recess capable of contacting the outer peripheral surface of the steel pipe pile 38, and an upper outer surface and a lower outer surface of the inner closing plate 47a. The upper plate 47c and the lower plate 47d, which are disposed so as to face each other and are provided with stepped portions 47b on both sides of the inner closing plate 47a, are sandwiched between the upper plate 47c and the lower plate 47d, and are closed inside. It is welded in combination with an arcuate outer closing plate 47e arranged at a constant interval outside the plate 47a. In addition, on both sides of the upper plate 47c, overhang portions 47f and 47f that can come into contact with the upper surfaces of the first pile holding portion 43c and the second pile holding portion 44c are provided. Further, the projecting portion 47f is provided with a round hole 47g for allowing the head of the bolt 48 to escape, and the outer closing plate 47e is provided with an opening 47h for placing a finger when the spacer member 47 is attached. ing.

When burying the steel pipe pile 38 using the pile driving machine 11 configured in this manner,
The upper end of the steel pipe pile 38 is connected to the cap rod 39, both the rotating arms 43 and 44 of the anti-vibration member 26 are closed, and the rotating ends of the both pile holding portions 43c and 44c are connected by a connecting pin 45. The lower part of the steel pipe pile 38 is held by both pile holding parts 43c and 44c. Next, the spacer member 47 is positioned immediately above the opening 46, and both the plate end portions 47i and 47i of the outer closing plate 47e are connected to the first notch 43i and the second notch 44i in the axial direction of the steel pipe pile 38. Are inserted into the first pile holding portion 43c and the second pile holding portion 44c in contact with the upper surfaces of the first pile holding portion 44c and the first closing plate 47a. The opening 46 between the inner arcuate recess 43b and the second inner arcuate recess 44b is closed.

  Thereby, both the plate end portions 47i and 47i of the outer closing plate 47e are respectively engaged with the first cutout portion 43i and the second cutout portion 44i in the horizontal direction, and the stepped portion 47b is engaged with the first inner arcuate recess 43b. The other end 43f of the second inner arc and the other end 44f of the second inner arcuate recess 44b are respectively engaged in the horizontal direction, so that the movement toward the steel pipe pile 38 and the circumferential direction are restricted. When the outer peripheral surface of the steel pipe pile 38 is pressed against the inner closing plate 47a, both plate end portions 47i and 47i come into contact with the first outer arcuate recess 43h and the second outer arcuate recess 44h, respectively. The movement of the spacer member 47 in the outward direction is restricted. In this state, the auger 27 is rotated and lifted to embed the steel pipe pile 38 in the ground. In addition, when adding a plurality of steel pipe piles 38, the upper end of the buried steel pipe pile 38 and the cap rod 39 are separated, the anti-rotation member 26 is opened in the reverse procedure described above, and the upper swing body The setup is advanced by connecting the upper end of the prepared steel pipe pile 38 to be added to the cap rod 39.

  In this manner, the detachable spacer member 47 disposed between the first rotation base portion 43a and the second rotation base portion 44a of the both rotation arms 43 and 44 with the anti-rest member 26 closed. Since the opening 46 is closed by this, the verticality can be improved by effectively suppressing the vibration of the steel pipe pile 38 with a simple structure. In addition, in the state where the bracing member 26 is opened, it is possible to sufficiently separate both the rotating arms 43 and 44 from the buried steel pipe pile 38, and the upper swing body 13 is swung in its place. Even so, the rotating arms 43 and 44 do not contact the steel pipe pile 38, and the steel pipe pile 38 can be added efficiently.

  Further, both plate end portions 47i and 47i of the outer closing plate 47e in the spacer member 47 are inserted in the axial direction of the steel pipe pile 38 on the upper surfaces of the first pile holding portion 43c and the second pile holding portion 44c, respectively. Since the first notch 43i and the second notch 44i that can be engaged in the horizontal direction are provided, the spacer member 47 can be easily and quickly attached and the steel pipe pile 38 rotates. Therefore, the steel pipe pile 38 can be stably buried without the engagement portion being released by the vibration caused by the operation.

  Further, since the spacer member 47 includes the arc-shaped inner blocking plate 47a that can contact the outer peripheral surface of the steel pipe pile 38, the first inner arc-shaped recess 43b, the second inner arc-shaped recess 44b, and the inner blocking plate 47a. It becomes possible to hold the outer peripheral surface of the steel pipe pile 38 uniformly by constituting a cylindrical shape, and the vibration of the steel pipe pile 38 can be more effectively suppressed.

  In the present embodiment, an insertion structure is provided in which both end portions of the spacer member can be inserted into and removed from the engaging recesses provided in both rotating arms. However, the spacer is provided in the engaging convex portions provided in both rotating arms. It is good also as an insertion structure which can insert / extract the engagement recessed part each provided in the both ends of the member, and can change the shape and attachment position of a spacer member suitably according to the dimension and shape of a steel pipe pile.

  DESCRIPTION OF SYMBOLS 11 ... Pile driver, 12 ... Lower traveling body, 12a ... Crawler, 13 ... Upper turning body, 14 ... Base machine, 15 ... Leader, 16 ... Rising cylinder, 16a ... Cylinder rod, 17 ... Front bracket, 18 ... Piping support Member: 19 ... cab, 20 ... equipment room, 21 ... spindle, 22 ... lower reader, 23 ... intermediate reader, 23a ... intermediate first member, 23b ... intermediate second member, 23c ... cylinder bracket, 24 ... upper reader 24a ... Upper first member, 24b ... Upper second member, 24c ... Upper third member, 25 ... Top sheave block, 26 ... Anti-shake member, 27 ... Auger, 28 ... Lifting device, 29 ... Guide pipe, 30 ... Upper guide give, 31 ... Lower guide give, 32 ... Drive sprocket, 33 ... Drive sprocket, 34 ... Lifting chain, 35 ... Drive rod, 36 ... Chuck 37, output mechanism, 38 ... steel pipe pile, 39 ... cap rod, 40 ... bracket, 41 ... first rotating shaft, 42 ... second rotating shaft, 43 ... first rotating arm, 43a ... first time Moving base, 43b ... first inner arc-shaped recess, 43c ... first pile holding portion, 43d ... first connecting portion, 43e ... one end, 43f ... other end, 43g ... first wall, 43h ... first outer circle Arc-shaped recess, 43i ... first notch, 44 ... second pivot arm, 44a ... second pivot base, 44b ... second inner arc-shaped recess, 44c ... second pile holder, 44d ... second connection 44e ... one end, 44f ... other end, 44g ... second wall, 44h ... second outer arcuate recess, 44i ... second notch, 45 ... connecting pin, 46 ... opening, 47 ... spacer member, 47a ... Inner closing plate, 47b ... Stepped portion, 47c ... Upper plate, 47d ... Lower plate, 47e ... Outer closing , 47f ... protruding portion, 47 g ... round hole, 47h ... opening, 47i ... plate end portions, 48 ... bolt

Claims (3)

  The working device is arranged to be movable up and down along a leader erected on the front part of a base machine composed of a lower traveling body provided with a crawler and an upper revolving body provided on the upper portion of the lower traveling body. In a pile driving machine in which a bracing member that holds the outer peripheral surface of a steel pipe pile that is rotationally driven by the working device is disposed below the leader, the bracing member can contact the outer peripheral surface of the steel pipe pile. A pair of pivot arms having arcuate recesses and mounted so as to be pivotable in a horizontal direction around a pair of pivot shafts provided at a lower portion of the reader; A first connecting part and a second connecting part for connecting the rotating ends of the pair of rotating arms to each other are provided, and the pair of rotating arms includes the first connecting part and the second connecting part. Closed by holding the steel pipe pile by connecting with a connecting pin Between the arcuate recesses on the base side of the pair of rotating arms in the closed state. A pile driving machine characterized in that a spacer member for closing the opening formed in the detachable is provided between the pair of rotating arms.   The pair of rotating arms are provided with engaging concave portions or engaging convex portions that can be engaged in the horizontal direction by inserting both ends of the spacer member in the axial direction of the steel pipe pile. Item 1. A pile driver according to item 1.   The pile driving machine according to claim 1 or 2, wherein the spacer member includes an arc-shaped recess capable of contacting an outer peripheral surface of the steel pipe pile.

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